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(2) Video Signal Definition and Function
The table below summarizes the definitions and functions of input video signals before LVDS
conversion.
Item
Original
Video signal
Display signal
(ODD)
(before LVDS
transmittance)
Video signal
(EVEN)
Clock
Horizontal
sync signal
Vertical sync
signal
Blanking
signal
Signal name
of signals
DATA-RA
DATA-GA
DATA-BA
DATA-RB
DATA-GB
DATA-BB
DCLKA
DCLKB
Hsync
Vsync
BLANKA
BLANKB
Number
Input/
output
Display data signal
10
RA9/GA9/BA9 is the highest intensity bit.
Input
10
RA0/GA0/BA0 is the lowest intensity bit.
10
Display data signal
10
RB9/GB9/BB9 is the highest intensity bit.
Input
10
RB0/GB0/BB0 is the lowest intensity bit.
10
Video signal timing: These signals
2
Input
continuously input are necessary. Data are
read when these signals are fallen.
Regulates one horizontal line of data: Begins
1
Input
control of the next screen when Hsync is
fallen.
Screen starts up control timing signal: Begins
control of the next screen when Vsync is
1
Input
fallen.
Input the same frequency in both
odd-numbered and even-numbered fields.
Display period timing signal.
H indicates the display period and L indicates
the non display period.
Note:
Set this timing properly like followings, as is
used internally for signal processing.
・Set the blanking period so that the number of
2
Input
・Set the number of blanking signals in one
If the BLANK changes when the Vsync
frequency is switched, the screen display may
be disturbed or brightness may change.
The screen display is restored to the normal
state later when the BLANK length is
constant again.
-5-
Signal definition and function
effective display data items in one horizontal
period is 1366.
vertical period to 384, which is one half the
number of effective scan lines.
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